acp-18-1023-2018.pdf (8.12 MB)
A detailed characterization of the Saharan dust collected during the Fennec campaign in 2011: in situ ground-based and laboratory measurements
journal contribution
posted on 2023-06-09, 11:57 authored by Adriana Rocha-Lima, J Vanderlei Martins, Lorraine A Remer, Martin ToddMartin Todd, John H Marsham, Sebastian Engelstaedter, Claire L Ryder, Carolina Cavazos-Guerra, Paulo Artaxo, Peter Colarco, Richard WashingtonMillions of tons of mineral dust are lifted by the wind from arid surfaces and transported around the globe every year. The physical and chemical properties of the mineral dust are needed to better constrain remote sensing observations and are of fundamental importance for the understanding of dust atmospheric processes. Ground-based in situ measurements and in situ filter collection of Saharan dust were obtained during the Fennec campaign in the central Sahara in 2011. This paper presents results of the absorption and scattering coefficients, and hence single scattering albedo (SSA), of the Saharan dust measured in real time during the last period of the campaign and subsequent laboratory analysis of the dust samples collected in two supersites, SS1 and SS2, in Algeria and in Mauritania, respectively. The samples were taken to the laboratory, where their size and aspect ratio distributions, mean chemical composition, spectral mass absorption efficiency, and spectral imaginary refractive index were obtained from the ultraviolet (UV) to the near-infrared (NIR) wavelengths. At SS1 in Algeria, the time series of the scattering coefficients during the period of the campaign show dust events exceeding 3500?Mm-1, and a relatively high mean SSA of 0.995 at 670?nm was observed at this site. The laboratory results show for the fine particle size distributions (particles diameter??
History
Publication status
- Published
File Version
- Published version
Journal
Atmospheric Chemistry and PhysicsISSN
1680-7316Publisher
European Geosciences UnionExternal DOI
Volume
18Page range
1023-1043Department affiliated with
- Geography Publications
Research groups affiliated with
- Sussex Sustainability Research Programme Publications
Full text available
- Yes
Peer reviewed?
- Yes
Legacy Posted Date
2018-02-07First Open Access (FOA) Date
2018-02-07First Compliant Deposit (FCD) Date
2018-02-07Usage metrics
Categories
No categories selectedKeywords
Licence
Exports
RefWorks
BibTeX
Ref. manager
Endnote
DataCite
NLM
DC